Controlling device for gas burners



Dec. 24, 1935. HEGWE|IN ET AL 2,025,413

CONTROLLING DEVICE FOR GAS BURNERS Filed Nov. 3, 1932 6 Sheets-Sheet 1 Dec. 24, 1935.

G. HEGWEIN El AL CONTROLLING DEVICE FOR GAS BURNERS Filed Nov. 3, 1932 6 Sheets-Sheet 2 Dec. 24, 1935.

, G. HEGWEIN ET AL CONTROLLING DEVICE FOR GAS BURNERS Filed Nov. 3, 1952 6 Sheets-Sheet 3 Dec. 24, 1935. G. HEGWEIN El AL 2,025,413

CONTROLLING DEVICE FOR GAS BURNERS Filed Nov. 5, 1952 e Sheets-Sheet 4 Dec. 24, 1935. v G, H w m r AL I 2,025,413

CONTROLLING DEVICE FOR GAS BURNERS Filed Nov. 34 1932 6 Sheets-Sheet 5 Dec. 24, 1935. s. HEGWEIN "ET AL CONTROLLING DEVICE FOR GAS BURNERS Filed Nov. :5, 1932 6 Sheets-Sheet 6 Patented Dec. 24, 1935 UNITED STATES PATENT OFFICE A rich Wilhelm Stockmeyer, Stuttgart, Germany, assignors to Junkers & 00., G. m. b. H., Dessau,

Germany Application November 3, 1932, Serial No. 641,054 In Germany November 5, 1931 22 Claims. (Cl. 236-21) The present invention relates to controlling devices for gas burners.

Thermostat valves are already known which control the flow of gas to agas-burner, and are held open by the heat of a pilot flame, or by the heat of the main burner, whilst they automatically close on the extinction of the pilot flame or the flames of the main burner, in order to prevent the further flow of gas to the main burner.

ready known, in which the pressure wave sent through the gas pipe enlarges a continuously burning flame, which in its turn in the enlarged condition comes into contact with a thermostat,

which'now expands and by means of a switch mechanism opens or closes a cock in the main gas pipe, according to whether the cock was closed or open before the emission of the pressure wave. The invention is distinguished from these known devices in that the main gas valve arranged in the gas pipe to the main burner is connected in a compulsorily movable manner with a thermostat (preferably, a thermostatic distortable diaphragm), for the heating of which a controlling flame is provided, means being provided for controlling the heating capacity of the controlling flame in dependence on the working conditions to be controlled (water or room heat, steam pressure, gas pressure and so forth), and. thereby to influence the degree of opening of the main valve. The variation of the action of the control flame on the main valve is preferably efiected by the point of the control flame being approached to or moved away from the heat-sensitive part of the main valve. The approach or moving away of the control flame can be effected both by moving the controlling burner in relation to the thermostat of the main valve, for example, by swinging or turning the controlling burner towards or away from the valve, as well as by varying the length of the control flame by increasing or reducing the quantity of controlling gas. Whilst the swinging or turning of the control burner necessitates a mechanical connection between the control burner and the controlling devices (thermostat, water current closure means, pressure regulator or the like), the second mentioned control arrangement by varying the length of the control flame has the advantage that no mechanical couplings, levers or rods are necessary. On the contrary, pressure variations in the gas pipe feeding the control flame, which are easy to control, suflice. The pressure regulation can be effected in a particularly simple manner by providing a throttling or retarding member movable by the flow of the Apparatus for igniting gas at a distance are al-.

main gas, which member controls the flow of control gas to the control flame in dependence on the speed of the main gas urrent in such a way that the current of control gas is throttled on an increasing speed of the main gas current, and on the other hand is increased with a declining current speed, in order to obtain a reduction or enlargement of the control flame and thereby a diminution or enlargement of the main valve passage.

Examples of construction of the invention are shown in the accompanying drawings, in which:--

Figures 1 to 5 show an arrangement having a variable length of control flame in various working positions;

Figure 6 is a section through a special construction of the main valve;

Figure 7 is a cross-section on the line VII-VIII of Fig. 8, which shows a longitudinal section through a flame controller;

Figures 9 to 12 show a construction in which the opening and closing of an ignition gas pipe is effected by swinging or turning the control burner and Figures 13 and 14 show a further construction having a mechanically moved control flame.

Referring now more particularly to the arrangement shown in Figs. l'to 5, inclusive, 2. main gas pipe as is connected to the inlet ll of a main gas valve A, from the outlet l2 of which a. burner pipe it leads to the main gas burner M. The shutting ofi of the main valve inlet llv from the outlet 12 is effected by a heat-sensitive expansible diaphragm l5 made of any heat-stable metal, e. g. sheet steel. The diaphragmfi closes the inlet it so long as it is cold (Figs. 1 and 2) by bearing firmly on the valve seat It. As soon as the distortable diaphragm is heated at its centre (Figs. 3 and 5), it arches and frees the gas passage corresponding to the degree of its heating and curvature.

Opposite the diaphragm H5 is arranged a small control-burner B-preferably, a safety burner closing automatically on the extinction of its flame-in such a way that the flame of the burner is directed nearly towards the middle of the diaphragm, in order to heat this latter. The control burner B consists of a casing H, which is closed by a heat-sensitive diaphragm [8, which has a burner opening 19 and carries a valve disc 20. So long as the diaphragm I8 is cold (Fig. 1), it presses the valve disc 20 on its seat 2I,-which forms the end of a control gas pipe 22 branching 19m the main gas pipe Hi. When the diaphragm H in Figs. 9-12.)

controlled valve C, a hand-valve D, and a watercurrent controlled valve E are provided, such as are required for a water heating apparatus.

The heat-controlled valve 0 consists of a valve casing, which is divided by a partition wall 23 into an inlet chamber 24 and an outlet chamber 25. The passage opening 26 in the partition 23 is controlled by a valve member 21 which is fas tened by means of an inextensible rod 28 to an expansible pipe 29, which projects for example into the water space 30 of a water-heater. So long as the water is cold (Figs. 1-4) the valve C for the current of control gas is open. If, on the other hand, the water has become hot (Fig. 5), the pipe 29 expands, and pulls the valve body 21 against its seat in the passage 26 and closes the valve C.

The hand-valve D consists of a cock casing 3| havinga plug 32, which has a simple bore 33. It serves for the voluntary shutting off of the appliance.

The water current controlled valve E consists of a gas chamber 34, in which is arranged a valve body 35, which co-operates with an outlet 36 to control the current of control gas flowing through the gas chamber. The valve body 35 is secured to a lever 31, which is mounted at 38 so as to rock, in a partition wall 39, and project into a water pipe to, where it is connected with a throttle device, for example, a throttle disc 4! movable by the water current. So long as the cook 42 is closed (Figs. 1 and 2), the valve body 35 is pressed by a spring 43 or the like against the outlet 36, so that the current of control gas through the control gas pipe 22 to the control burner B is interrupted even when the valves D and C in that pipe are open. When the cook 42 is opened (Figs. 3-5), the flowing water carries the throttle disc M with it, and opens the controlling gas outlet 36 of the gas chamber 31, as shown in Figs. 3 to 5.

In order to prevent an extinction of theflame at the control burner B on the interruption of the current of control gas by any one of the valves described (Figs. 3-5), the burner casing I! is connected with the main gas pipe ID by a pilot gas pipe 44, the outlet of which is also controlled by the thermostat valve 20. The amount of pilot gas is controlled by a hand adjustable throttle 45 provided in the pilot gas pipe 44. In-

stead of the separate pilot gas pipe 44, a small passage could of course also be provided in each of the valves C, D, E, which remains permanently open, and permits the passage of the necessary quantity of pilot gas. (See, for example, valve Furthermore, the casing of the control burner Bis connected to an ignition pipe 46 also branching from the main gas pipe l0 in advance of the main gas valve A, in which pipe 46 an ignition valve F,.for example, a press button valve, preferably self-closing and operable by hand at will, is arranged. The ignition valve F consists of a casing 41 having a partition wall 48, the passage in which is closed by a valve body 43 under the action of the spring 50. The valve body 49 is secured to a rod 5| projecting from the casing 41 and carrying a button 52 operated by finger pressure. When the button 52 is pressed (Fig. 2) the valve 49 opens, and allows a powerful current of ignition gas to flow into the casing l I of the control burner B. The ignition gas escapes unhindered through the burner opening l9, and can be there ignited by means of a suitable ignition appliance.

In order to maintain a uniform height of flame at the main burner l4 even with variations of pressure in the main gas pipe I 0, a flame controller G is provided in the main gas pipe I. The flame controller consists of a throttling member, for example, a springy flexible plate 53, which projects into the main gas current, and is more or less near to the inlet 64 of the controlling gas pipe 22 according to the strength oi. the gas current (Fig. 4). By the throttling oi the control gas current thus obtained, the length of the pilot flame is varied, for example, shortened on an increase in pressure, whereby the heate sensitive main valve is again influenced in the closing direction. A by-pass pipe 55 having an adjustable throttle 56 permits the adjustmentof the effective throttle pressure on the throttle plate 53. Q

The mode '01 working of the apparatus shown in Figs. 1-5 is as follows:-

In Fig. 1 the apparatus is shown at rest, that is to say, every gas pipe and also the water pipe are closed; the water in the heater 30 is cold. If the apparatus is to be put into operation, this can now only be done by igniting the control flame at the control burner B (Fig. 2).

For this purpose the knob 52 of the ignition valve F is pressed, so that the ignition gas flows through the ignition pipe 46 to the control burner B. The ignition gas emerging from the burner opening 19 is lighted by means of an ignition appliance (gas igniter) and forms a flame which heats the diaphragm I8, so that it curves out-, Wardly and opensthe valve 20. The pilot gas now flows through the pipe 44 into the control burner casing l1, and maintains a small pilot flame, the heat transmission of which does not suffice however to cause the heat-sensitive diaphragm i5 of the main valve A to open (Fig. 2).

If now the water cook 42 (Fig. 3) is opened the current pressure of the water on the throttle disc 4| opens the valve 35. The control gas now flows through the control gas pipe 22 to the control burner B and strengthens the short pilot flame burning there to form a long control flame the point of which touches the diaphragm I5 of the main gas valve A, so that the curving diaphragm l5 opens the gas passage to the main burner l4. The main gas emerging from the main burner can be ignited by the control flame itself, by so arranging it that it penetrates past the diaphragm l5 of the main valve A into the burner zone, or is deflected by a deflecting plate 51 wholly or partly to the main burner M (Fig. 3). Preferably, the deflecting plate 51 is connected in a heat-conducting manner with the diaphragm l 5 in order, on the one hand, to prevent a direct contact between the flame and the diaphragm, and on the other hand to lead the entire heat of the flame to the centre of the diaphragm. Of course, an ignition ladder device (ascending gas jets in a pipe 68) could also be provided (Fig. 4), which receives its gas from the casing ll of the controller B or from the pipe l3 behind the main gas valve A.

If a pressure wave occurs in the main gas pipe 10 (as illustrated by the curving arrow linesin Fig. 4), which causes a rise in pressure, the more rapidly flowing main gas moves the throttle disc 53 d. the flame controller G against the inlet 54 of the control gas pipe 22 and throttlesthecontrol gas. Consequently, the control flame at the control burner B becomes shorter, so that the diaphragm l of the main valve is no longer so strongly heated, its curvature decreases, and thus the flow of main gas to the control burner B is throttled. The flames of the main burner are thus not strengthened by the increase in pressure but always maintain the same length. a

If the hand valve D in the control pipe 22 is closed, or the water cock 42 turned to closed position, so that the valve 35 closes, or if by attaining the permissible maximum temperature of the water the heat-controlled'valve C is closed (Fig. 5), the flow of the control gas is interrupted or considerably decreased so that the control flame becomes shorter at the control burner B and the cooling diaphragm l5 of the main gas valve A correspondingly reduces the capacity of the main burner.

If the controlling or pilot flame becomes extinguished for any reason, the expansible diaphragm l5 automatically closes the main valve A, so that the main burner I4 is also extinguished, whilst the diaphragm l8 on the control burner B automatically closes the valve 20 and also interrupts the current oi pilot or control gas. Unconsumed gas can thus not escape at any point.

Referring now more particularly to Fig. 6:

In order that the diaphragm if of the main valve A shall more quickly follow on a shortening of the control flame and throttle the main gas current, it is desirable to provide for an effective carrying away of the heat. This is effected, firstly, by the edge of the diaphragm being connected in a good heat-conducting manher with the casing of the main gas valve, and secondly by the cold fresh gas current being directed against the centre of the diaphragm l5 (Fig. 6). For this purpose, both the valve seat of the main gas valve A and also the valve body are so formed that the main gas current emerging between them is directed towards the middle of the diaphragm. In Fig. 6 this is attained by the valve seat it being provided with a raised nozzle-shaped rim l6, and by the valve 'body 59 suspended on the diaphragm l5 having a conical form corresponding to this nozzle. Furthermore, cooling ribs H, for example of thin hoop iron, may be provided on the side of the diaphragm l5 that comes in contact with the gas, these ribs only touching the centre of the diaphragm and otherwise freely projecting into the gas current. By reason of the arrangement of the cooling ribs H, the heat suppiied to the centre of the diaphragm is very rapidly conducted away again, so that the diaphragm I? only slowly opens when it is acted on by the control flame,

and rapidly closes as soonas the action of the control flame ceases.

In Figs. '7 and 8 a further form of construction of the flame controller G is shown, which diflers only from that illustrated in Figs. 1-5 by the fact that the by-pass pipe 55 serving for bypassing the throttle plate or disc 53 is formed by a hollow rivet 88 by which the springy throttle plate 53 is fastened to an inset 8|, which also carries the inlet 54 of the control gas pipe 22. By the combination of the throttle disc 53 with the throttle opening 54 controlled by it to form passage to the main burner (Fig. 12).

an easily exchangeable constructional part, a simple construction of the flame controller is provided.

In Figs. 9-12 an arrangement corresponding to Figs. 1-5 is shown in which the opening and closing of the ignition gas pipe 48 is efiected by swinging or turning the control burner B. A is the main gas valve, the passage l6 of which is controlled by an expansible diaphragm l5. B is the control burner, the heat-sensitive dia-' phragm l8 of which contains the burner orifice or jet l9 and carries a valve 20. The valve 20 controls the outlet of a control pipe 18 which is surrounded by a second pipe 19 serving as the ignitiongas pipe. The .two pipes I8 and 19 forming a double pipe are connected with a cock plug 80 which is revoluble in a cock casing 8|. The plug 80 and its casing 8| together form the ignition gas valve already known from Figs. 1-5. The pipe 18 for the control gas is carried through the plug 80 and opens into a chamber 82, which is connected by the control gas pipe 22 with the main gas pipe Ill by the intermediary of one or more valves H.

The valve H has a cock plug 83 having a wide bore 84 for the passage of a large quantity of control gas and a narrow passage 85 for asmall quantity of guardian gas. The pipe 19, on the other hand, opens into a longitudinal bore 86 of the plug 88, which has a cross-bore 81. This-- cross-bore 81 can be brought into register with a cross-bore 88' of the cock casing 8| by turning the cock plug 80, to enable the ignition'gas to pass from the ignition pipe 46 into the pipe I9.

If the control frame (Fig. 9) is not burning,'the valve of the control burner B closes the outlet for the control gas, and the cold diaphragm l5 of the main gas valve A closes the passage for the main gas. If it is desired to light the control flame, the control burner B is swung or turned about the axis of rotation of the ignition valve F, so that the cross-bores Bland 88 come into register, and the ignition gas can flow through the pipe 79 into the casing ll of the control burner B. The ignition gas emerging from the burner opening it is lit, whereupon the heat of the ignition flame causes the diaphragm I8 to curve. The gas from the control gas pipe 18 can now also emerge through the now open-valve 20 (Fig. 10). The control burner B is now swung back again into its working position, in which its burner opening i9 is directed towards the .expansible diaphragm l5 of the main valve (Fig.

11). By this movement the ignition pipe 46, I9

is again interrupted, so that the control burner only receives gas by the path 22, 18. The quantity of gas emerging is thus still only dependent upon whether the valve H in the control gas pipe 22 is opened or closed.

If the valve H is moved to the closed position shown in Fig. 11, the narrow bore 85 of the valve plug 83 allows only a. small quantity of gas to pass through which just suifices to maintain a small pilot flame, so that the valve 20 of the control burner B remains open. If the valve H is opened, a stronger current of control gas flows through the wide bore 84, which increases the pilot flame to form the control flame, so that the heated diaphragm l5 of the main gas valve A opens the gas rangement shown in Figs. 9-12 is particularly adapted for such heating installations in which the control burner B is diflicult of access in the working position, because it can be brought by The ar-- swinging or turning into a position more favourable for the ignition.

Figs. 13 and'14 show a furtherconstruction of a control device for a heat-sensitive main valve, in which the regulation of the control flame is effected mechanically. A is again the main valve having the heat-sensitive expansible diaphragm l5 which controls the passage l6 of the main gas valve. Above the diaphragm IS a protective hood 62 is arranged, the opening '63 of which leaves free only the central part of the diaphragm I5. The protective hood 62 has preferably the form of a funnel directed towards the diaphragm, so that it only comes close to the centre the diaphragm, and otherwise stands some distance away from the diaphragm to avoid a jet action, so that an unimpeded circulation of cool air is possible between the diaphragm and the protective hood. Such a protective hood can, of course, also be used in the arrangements according to Figs. 1-12. B is the control burner, which is preferably constructed to correspond to the control burner shown in Figures 1-5. v

The control burner B is pivotally connected with the end of the control gas pipe 22 by means of a cock-joint 64, 65. By rocking the control burner B, the direction of the control flame towards the diaphragm if) can thus be simultaneously' altered, and also the strength of the control gas current varied, and the cock-Joint 64, 65 is, in fact, so constructed that its gas passage is fully open when the control flame is directed towards the centre of the diaphragm 15 (Fig. 14), whilst the gas passage is reduced in proportion as the controlburner is rocked laterally (Fig. 13) Provision is however made, so that even in the extreme lateral position of the control burner (Fig. 13) a small gas passage is still left which feeds a small pilot flame.

The control burner B is connected byany suitable mechanical transmission means, for example, by a link 66, with the movable working part of a controller or switch H. In the construction shown, the. controller H is a water current controller having a diaphragm 61, enclosed in a casing, which it divides into two chambers 66 and 69. The two chambers 68 and 69 are connected to a water pipe"), 14, which contains a contracted or throttle part, II and can be closed by means of a cook 12. The chamber 68 is connected-seen in the direction of flow of the water-to the part 10 of the water pipe to the rear of the throttle H; the'chamber 69, on the other hand, is connected by a passage 13 in advance of the throttle II with the part 14 of the water pipe.

So long as the water cock I2 is closed, the same pressure prevails in the water pipe 10, 14 on both sides of the throttle or constriction II and thus alsoin the two chambers 66 and 69, so that the diaphragm 61 is in the position of repose (Figure 13).

When the cook 12 is opened, the full pressure 'of the water main obtains only in the pipe portion 16 to the rear of the throttle H and in the chamber 66, whilst in the pipe part 14 in advance of the throttle and thus also in the chamber 66 thereis a lower pressure. The diaphragm 61 is therefore bulged in the direction of the lower pressure (Fig. 14), whereby it moves a rod 15 .connected with it. The rod 15 is movably connected by the link 66 with the control burner B, so that the control burner is rocked to and fro about the cock joint. 64, 65 in conformity with the movements of the diaphragm 61.

The arrangement is such that the control burner B is rocked quite towards one side when the water cock I2 is closed (Fig. 13), so that only a small pilot flame burns which is not able to move the diaphragm I 6 to open the main gas valve. If the cock I2 is opened, the diaphragm 61 moves to the right and rocks the control burner B in such a way that the control flame is directed through the opening 63 of the protective hood 62 towards the centre of the diaphragm I 5. At the same'time the small pilot flame is strengthenedby the opening of the gas passage in the cock-joint 66, 65 to form a powerful control flame, which heats the diaphragm I!) so strongly that it arches and frees the gas passage to the main burner (Fig. 14). If the water cook 15 12 is only partly closed, the diaphragm 61 moves back only a short distance towards its position of repose and in so doing it also rocks the control burner B coupled to it. Thus, flame of the control burner is somewhat reduced bythe contraction of the gas passage in the cock joint 66, 65, and at the same time the effective action of the flame is weakened by the rocking away of the control burner from the centre of the diaphragm IS. The diaphragm i5 is thus no longer so 2! strongly heated, and is cooled down by the main gas current flowing past it, so that its curvature is reduced, and the gas passage I 6 again somewhat narrowed. The bumer capacity is thus adapted to the actual water passage. In the 3" control pipe 22, further controlling devices and valves, for example, hand valves, heat-controlled valves, flame controllers and the like, may also be arranged, which control the controlling gas current and thus the length of flame in the 7 same manner as the valves and throttling devices C, D, G in Figures 1-5. A pilot gas pipe and ignition pipe is also preferably provided, such as shown in Figs. 1=5.

Instead of a, rocking movement, the control burner could also be given a rectilinear movement.

We declare, that what we claim is:

1. A controlling arrangement for gas burners and gas heated appliances comprising a main gas burner, a main gas pipe for supplying the main gas burner, a thermostatically operated valve for said main gas burner, a control burner operating on said main 'gas valve, means in the main gas. pipe for controlling the flow of gas to said control burner in dependence upon changes in the rate of flow of gas in the main gas pipe.

2. A controlling arrangement for gas burners and gas heated appliances, comprising a main gas burner, a main gas pipe supplying said gas burner, a thermostatically operated valve in said main gas pipe, a control burner operating on said main gas valve, a feed pipe connecting said control burner with said main gas pipe and a device in said main gas pipe operable under vac0 riations in the rate of flow of gas in said main gas pipe to control the cross-sectional area of said pipe supplying the control burner.

3. A controlling arrangement for gas burners and gas heated appliances, comprising a main gas burner, a main gas pipe supplying said gas burner, a thermostatically operated valve in said main gas pipe, a control burner operating on said main gas valve, a feed pipe connecting said control burner with said main gas pipe and a 7 throttling device acting upon the opening of said feed pipe in said main gas pipe and operable by changes in the rate of flow of gas in said main gas pipe.

4. A controlling arrangement for gas burners and gas heated appliances, comprising a main gas burner, a main'gas pipe supplying said gas burner, a thermostatically operated valve in said main gas pipe, a control burner operating on said main gas valve, a feed pipe connecting said control burner with said main gas pipe, a mouth piece for said feed pipe formed as a valve seat and a throttling device formed as a unit with said mouth piece and operable thereon in dependence upon changes in the rate of flow of gas in the main gas pipe.

5. A controlling arrangement for gas burners and gas heated appliances, comprising a main gas burner, amain gas pipe supplying said gas burner, a thermostatically operated valve in said main gas pipe, a control burner operating on saidrmain gas valve, a feed pipe connecting said control burner with said main gas pipe, a mouth piece for said feed pipe formed as a valve seat in said main gaspipe and a resilient throttle disc attached at one point to said mouthpiece as a unit therewith and operable toward and from said valve seat under changes in the rate of flow of gas in said main gas pipe to control said mouthpiece and simultaneously to control the cross section of the main gas pipe.

6. A controlling arrangement for gas burners and gas heated appliances comprising a main gas burner, a main gas pipe supplying said gas burner, a thermostatically operated valve in said main gas pipe, a control burner operating on said main gas valve, a feed pipe connecting said control burner with said main gas pipe, an insert member in said main gas pipe having a bore therethrough, a springy disc secured to said insert member to cover or partially cover said bore, a mouth piece for said feed pipe formed as a valve seat for said springy disc and mounted in said insert member and a hollow rivet securing said springy disc to said insert member and forming a by-pass therethrough for the passage of gas to said main gas burner when said springy disc closes said bore in said insert member, under the influence of an increase in volume rate of flow of gas in said main gas pipe on the pressure side of said insert member.

'7. A controlling arrangement for gas burners and gas heated appliances, comprising a main gas burner, a main gas pipe supplying said gas burner, a thermostatically operated valve in said main gas pipe, a control burner operating on said main gas valve, a feed pipe connecting said control burner with said main gas pipe, a throttling member in said main gas pipe operable under an increase in volume rate of flow of gas in said main gas pipe on the pressure side of said throttling member to throttle the passage of gas through said main gas pipe and to operate on said feed pipe to alter the quantity of gas flowing therethrough and a by-pass in said main gas pipe about said throttling member.

8. A controlling arrangement for gas burners and gas heated appliances, comprising in combination, a main gas burner, a main gas pipe supplying said gas burner, a thermostatically operated valve in said main gas pipe having as its thermostat element a distortable disc with one face exposed outwardly of said main gas pipe, a control burner comprising a distortable thermostatic disc having a'gas opening therein heated by the flame emerging therefrom, said gas opening being arranged to project said flame toward said exposed face of said first-mentioned distortable disc, a valve in said control burner operated by said distortable thermostatic disc of said control burner to automatically close when the flame issuing from the opening of saiddisc is extinguished, and means for varying the effective position of the flame of said control bumer in relation to the distortable thermostatic disc 5 of the main gas valve in dependence upon the conditions to be controlled.

9. A controlling arrangement for gas burners and gas heated appliances, comprising a main gas burner, a main gas pipe supplying said gas burner, a valve seat in said main gas pipe, a distortable thermostatic valve disc operating on said valve seat, a deflecting plate mounted on said thermostatic valve disc, a control burner emitting a flame operating on said valve disc and deflected by said deflecting plate into the path of said gas from main gas burner and means for varying the effective position of the flame of said control burner in relation to said main gas valve in dependence upon the conditions to be cc trolled.

10 A controlling arrangement for gas burners and gas heated appliances, comprising a main gas burner, a main gas pipe supplying said gas burner, a valve seat in said main gas pipe, a distortable thermostatic valve disc operating on said valve seat, a deflecting plate mounted or said valve disc in heat conducting relation thereto, a control burner emitting a flame upon said deflecting plate and deflected thereby into the path of gas from said main gas burner and means for varying the effective position of the flame of said control burner in relation to said main gas valve in dependence upon the conditions to be controlled.

11. A controlling arrangement for gas burners and gas heated appliances, comprising a main gas burner, a main gas pipe supplying said main gas burner, a thermostatically operated valve in said main gas pipe, a control burner operating on said main gas valve and movable in relation thereto, means comprising at least one control member operable in dependence upon the conditions to be controlled, and a connection between said movable control burner and said con- 5 trol member for moving said control burner with respect to said main gas valve.

12. A controlling arrangement for gas burners and gas heated appliances, comprising a main gas burner, a main gas pipe supplying said gas burner, a thermostatically operated valve in said main gas pipe, a control burner operating on said main gas valve, a pipe connecting said control burner to said main gas pipe, a rotary pipe supporting said control burner and a cock valve rotatable with said pipe supporting said control burner to connect said rotatable pipe with said main gas pipe when the control burner is turned away from the main gas valve to supply gas to said control burner for ignition purposes.

13. A controlling arrangement for gas burners and gas heated appliances, comprising a main gas burner, a main gas pipe supplying said main gas burner, a thermostatically operated valve in said main gas pipe and a laterally movable control burner operating on said main gas valve and movable in respect to said main valve in dependence upon the conditions to be controlled.

14. A controlling arrangement for gas burners and gas heated appliances, comprising a main gas burner, a main gas pipe supplying said main gas burner, a thermostatically operated valve in said main gas pipe, a laterally movable control burner operating on said main gas valve and movable in respect to said main valve in and a cock valve at the pivot of said laterally movable control valve operated thereby to control the amount of gas fed to the control burner.

15. A controlling arrangement for gas burners and gas heated appliances, comprising a main gas burner, a main gas pipe supplying said gas burner, a valve seat in said main gas pipe, a thermostatically operated valve disc operating on said valve seat and having an outer free face and an inner face exposed to the gas in said main gas pipe, a deflecting plate on said outer face of said valved disc, heat conducting fins on said inner face of said valve disc in the path of cool gases passing thereunder, a control burner operating into the path of said main gas burner and means for varying the efiective position of the flame of said control burner in relation to said main gas valve in dependence upon the conditions to be controlled.

16. A controlling arrangement for gas burners and gas heated appliances comprising a main gas burner, a thermostatically operated valve for said main gas burner, a control burner operating on said main gas valve, means for varying the efiective position of the flame of the, control burner in relation to said main gas valve in dependence upon the conditions to be controlled and a hood arranged between said burner and said thermostatically operated valve having a center opening closely adjacent the heat-sensitive member of said valve. I

17. A controlling arrangement for gas burners and gas heated appliances comprising a main gas burner, a thermostatically operated valve for said main gas burner, a control burner operating on said main gas valve, means for varying the effective position of the flame of the control burner in relation to said main gas valve in dependence upon the conditions to be controlled, and a funnel shaped hood arranged between said burner and said thermostatically operated valve and directed towards the heat sensitive member of said valve.

18. A gas-heated plant comprising, in combination, a water tank, a valve controlled waterpipe, a main gas burner for heating said tank, a main gas pipe supplying said burner, a thermostatically-operated main gas valve controlling the flow of gas through said main gas pipe to said main gas burner, said valve having as its operating member a distortable thermostatic disc having a face exposed outwardly of said main gas pipe for heating the same, a control burner having a jet orifice disposed to project a heating flame upon said exposed face of said thermostatic disc, and means automatically operating in response to changes in at least one of the working conditions of temperature, fluid pressure and water flow in the gas-heated plant for controlling the projection of flame from said jet orifice upon said exposed face of said thermostatic disc and thereby to control the supply of gas to said control burner in dependence upon the conditions to be controlled.

19. A controlling arrangement for a gas heater comprising the combination with a main gas v burner and a main gas pipe supplying said burner,

of a thermostatically-operated main gas valve controlling the flow of gas through said main gas pipe to said main gas burner, said valve having as its operating member a distortable thermostatic disc having an inner face exposed to contact therewith of the main gas stream in said main gas pipe and an outer face exposed outwardly of said main gas pipe for heating the same, a control burner having a jet orifice disposed to project a heating flame upon said ex- 10 posed face of said thermostatic disc, 9. gas-supply conduit for said control burner and means comprising a valve in said conduit for controlling the supply of gas to said control burner. in dependence upon the conditions to be controlled.

20. A controlling arrangement for a gas-operated water heater comprising, in combination, a main gas burner, a main gas pipe supplying said burner, a thermostatically-operated main gas valve controlling the flow of gas through said main gas pipe to said main gas burner, said valve havingas its operating member a distortable thermostatic disc having an outer face exposed outwardly of said main gas pipe for heating the same, a control burner having a jet orifice disposed to project a heating flame upon said exposed face of said disc, a control gas conduit leading from said main gas pipe on the pressure side of said main gas valve to said control burner,

a valve in said control-gas conduit to control ed main gas valve controlling the flow of gas through said main gas pipe to said main gas burner, said valve having as its operating member a distortable thermostatic disc having an outer face exposed outwardly of said main gas pipe for heating the same, a control burner having a jet orifice disposed to project a heating flame upon said exposed face of said disc, a control-gas conduit leading from said main gas pipe on the pressure side of said main gas valve to 60 said control burner, and a thermostatically 0perated valve controlling the flow of gas through said control-gas conduit and having its thermostatic element exposed to the temperature conditions in said tank.

22. A controlling arrangement for gas burners and gas heated appliances, comprising a main gas burner, a main gas pipe supplying said gas burner, a valve seat in said main gas pipe, a thermostatically operated valve disc'having an inner side or face operating on said valve seat and an outer exposed face, a deflecting. plate mounted on said outer face of said thermostatic valve disc and cooling ribs on said inner face of said valve disc touching only the center thereof.

GEORG HEGWEIN. WILHELM RbMMELT. FRIEDRICH WILHELM STOCKMEYER. 

